Squelch open when battery under 7.0 V in DM-1801, etc.
Posted: Wed Dec 16, 2020 9:24 am
Hi Roger,
I noticed that when the battery is low (7.0 V and lower, around 37% battery in my case, and it’s strange because it doesn’t happen when voltage is 7.1 V), the squelch remains open after the end of a received transmission, independently of the level that has been set (and does other weird things, for example, when transmitting in FMN at 5W, i sometimes hear a loud beep when I release PTT and then a constant hiss sound, the speaker remains on but plays nothing). As battery level goes lower, this happens all the time, and the radio needs to be turned off and on to have the squelch back on again (but remains open whenever the radio receives another signal). This happens in another DM-1801 i could get my hands on, and both in the R2020.10.16 and D2020.11.12.01 versions.
Also, I noticed that in one of those two radios, the battery percentage (when it’s stable) is always around 0.1-0.2 V or 6% lower. I don’t know if I need to calibrate this somewhere, or if it’s just due to hardware imprecision. And as I was turning on and off both radios to test the squelch problem, I saw that sometimes (quite rarely, 1 in every 15th or 20th time i turned off the radio), some vertical lines remained on the screen for 10 seconds or so.
I’ve also been trying to understand the code (and put into practice what I'm learning at univesity!), so I set everything up, compiled, and noticed that features like Monitor Mode, or the custom power settings for each channel are not there anymore. Did I miss something, or have you stopped updating the repo due to those people that were trying to sell the code on ebay (in which case, I understand it)?
Anyway, I’m truly impressed at the amount of effort that has been put into this code, congratulations to you and the rest of the developers for your work!
73
I noticed that when the battery is low (7.0 V and lower, around 37% battery in my case, and it’s strange because it doesn’t happen when voltage is 7.1 V), the squelch remains open after the end of a received transmission, independently of the level that has been set (and does other weird things, for example, when transmitting in FMN at 5W, i sometimes hear a loud beep when I release PTT and then a constant hiss sound, the speaker remains on but plays nothing). As battery level goes lower, this happens all the time, and the radio needs to be turned off and on to have the squelch back on again (but remains open whenever the radio receives another signal). This happens in another DM-1801 i could get my hands on, and both in the R2020.10.16 and D2020.11.12.01 versions.
Also, I noticed that in one of those two radios, the battery percentage (when it’s stable) is always around 0.1-0.2 V or 6% lower. I don’t know if I need to calibrate this somewhere, or if it’s just due to hardware imprecision. And as I was turning on and off both radios to test the squelch problem, I saw that sometimes (quite rarely, 1 in every 15th or 20th time i turned off the radio), some vertical lines remained on the screen for 10 seconds or so.
I’ve also been trying to understand the code (and put into practice what I'm learning at univesity!), so I set everything up, compiled, and noticed that features like Monitor Mode, or the custom power settings for each channel are not there anymore. Did I miss something, or have you stopped updating the repo due to those people that were trying to sell the code on ebay (in which case, I understand it)?
Anyway, I’m truly impressed at the amount of effort that has been put into this code, congratulations to you and the rest of the developers for your work!
73